Commit 0a344186 authored Oct 29, 2018 by Ajay Singh Parmar Committed by Ashwini Muduganti Nov 09, 2018

drm/msm/dp: check for aborted flag before controller power on



In case the abort flag has been set, do not proceed with controller
power on. Abort flag could mean that host has been de-initialized.
Powering controller in that condition could result in unstable system.
Avoid this by taking no action if abort flag has been set and return
with proper error code.

CRs-Fixed: 2338231
Change-Id: I95438e43060decb256039555957eb54f08edbc3d
Signed-off-by: Ajay Singh Parmar <aparmar@codeaurora.org>

parent c256319f

drivers/gpu/drm/msm/dp/dp_ctrl.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -1112,6 +1112,11 @@ static int dp_ctrl_on(struct dp_ctrl *dp_ctrl, bool mst_mode, bool shallow)
		if (ctrl->power_on)
		goto end;

		if (atomic_read(&ctrl->aborted)) {
		rc = -EPERM;
		goto end;
		}

		ctrl->mst_mode = mst_mode;
		rate = ctrl->panel->link_info.rate;